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Title: Low flow fume hood

Abstract

A fume hood is provided having an adequate level of safety while reducing the amount of air exhausted from the hood. A displacement flow fume hood works on the principal of a displacement flow which displaces the volume currently present in the hood using a push-pull system. The displacement flow includes a plurality of air supplies which provide fresh air, preferably having laminar flow, to the fume hood. The displacement flow fume hood also includes an air exhaust which pulls air from the work chamber in a minimally turbulent manner. As the displacement flow produces a substantially consistent and minimally turbulent flow in the hood, inconsistent flow patterns associated with contaminant escape from the hood are minimized. The displacement flow fume hood largely reduces the need to exhaust large amounts of air from the hood. It has been shown that exhaust air flow reductions of up to 70% are possible without a decrease in the hood's containment performance. The fume hood also includes a number of structural adaptations which facilitate consistent and minimally turbulent flow within a fume hood.

Inventors:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Pleasant Hill, CA
  2. Albany, CA
  3. Berkeley, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
OSTI Identifier:
874633
Patent Number(s):
6428408
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01L - CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
B - PERFORMING OPERATIONS B08 - CLEANING B08B - CLEANING IN GENERAL
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DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
flow; fume; hood; provided; adequate; level; safety; reducing; amount; air; exhausted; displacement; principal; displaces; volume; currently; push-pull; plurality; supplies; provide; fresh; laminar; exhaust; pulls; chamber; minimally; turbulent; manner; produces; substantially; consistent; inconsistent; patterns; associated; contaminant; escape; minimized; reduces; amounts; shown; reductions; 70; decrease; hoods; containment; performance; structural; adaptations; facilitate; air flow; laminar flow; /454/

Citation Formats

Bell, Geoffrey C, Feustel, Helmut E, and Dickerhoff, Darryl J. Low flow fume hood. United States: N. p., 2002. Web.
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Bell, Geoffrey C, Feustel, Helmut E, & Dickerhoff, Darryl J. Low flow fume hood. United States.
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Bell, Geoffrey C, Feustel, Helmut E, and Dickerhoff, Darryl J. Tue . "Low flow fume hood". United States. https://www.osti.gov/servlets/purl/874633.
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@article{osti_874633,
title = {Low flow fume hood},
author = {Bell, Geoffrey C and Feustel, Helmut E and Dickerhoff, Darryl J},
abstractNote = {A fume hood is provided having an adequate level of safety while reducing the amount of air exhausted from the hood. A displacement flow fume hood works on the principal of a displacement flow which displaces the volume currently present in the hood using a push-pull system. The displacement flow includes a plurality of air supplies which provide fresh air, preferably having laminar flow, to the fume hood. The displacement flow fume hood also includes an air exhaust which pulls air from the work chamber in a minimally turbulent manner. As the displacement flow produces a substantially consistent and minimally turbulent flow in the hood, inconsistent flow patterns associated with contaminant escape from the hood are minimized. The displacement flow fume hood largely reduces the need to exhaust large amounts of air from the hood. It has been shown that exhaust air flow reductions of up to 70% are possible without a decrease in the hood's containment performance. The fume hood also includes a number of structural adaptations which facilitate consistent and minimally turbulent flow within a fume hood.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}
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